diff --git a/src/visibility.rs b/src/visibility.rs
index 37464fc..36a3c57 100644
--- a/src/visibility.rs
+++ b/src/visibility.rs
@@ -85,7 +85,7 @@ impl Viewshed {
         );
         let mut context: Context<u8> = Context::default();
         let vision_distance = vision_distance::Circle::new(self.range);
-        let shape = Collider::cuboid(0.5, 0.5);
+        let shape = Collider::cuboid(0.5 - f32::EPSILON, 0.5 - f32::EPSILON);
         let mut new_visible_entities = HashSet::new();
         let size = (
             (start.translation().x.abs() + self.range as f32) as u32,